07.12.2015 23:30
There are no ways how to change a username in Castle Clash by yourself. However, you can make a new account and talk to live support tech. They can transfer all data from the old acc to a new one. That's how you can change your name in the game.
Also, you are able to create a new Gmail account and switch between old and new acc in the game. For this sake, just enter Settings and push on the Switch button.